A.should be correctly carried out
B.should correctly be taken place
C.should carded with care
D.must to carry out with great care
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A.occurred
B.occurring
C.not happening
D.occur
A.gases
B.paints
C.inhibitors
D.detergent
A.agent
B.shipchandler
C.surveyor
D.engineer
A.principle
B.principal
C.cause
D.case
A.renewed
B.welded
C.machined
D.chromium-plated
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When fuel oil has seriously contaminated a diesel engine lubricating oil, you should （）.
For a given size engine, the two-stroke/cycle diesel engine will deliver more power than a four-stroke/cycle diesel engine because （）.
The minimum speed an engine must attain before ignition can occur depends upon （）.
The ability of the governor to prevent fluctuations in engine speed is termed （）.
An automated diesel engine should normally shut down due to （）
The main purpose of the piston oil scraper rings is to （）.
In using reduction gears to obtain efficient propeller speeds, （）.
Combustion knock can occur in the cylinders of a diesel engine under any condition permitting （）.
The function of diesel engine piston compression rings is to （）.
In diesel engines, the four basic events (intake, compression, power and exhaust) are performed once in （）.